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lethain.com

https://lethain.com· First analyzed 07 May 2026· Updated 07 May 2026
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lethain.com
Desktop screenshot of lethain.com
Mobile screenshot of lethain.com
Mobile

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Hosting Provider

GitHub Pages
pages.github.com

IP Address

185.199.111.153

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

ns-516.awsdns-00.net.ns-1328.awsdns-38.org.ns-1555.awsdns-02.co.uk.ns-298.awsdns-37.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
555 ms10%
Speed Index
722 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
54 KB
5 requests
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Frontend
Framework
Hugov0.160.1
Infrastructure
Platform
GitHub Pages
CDN
Fastly

Technology Stack

3 Technologies Detected

Frameworks

1
Angular

CSS Frameworks

1
Tailwind CSS

Analytics

1
Plausible Analytics

SEO Analysis

D53/100
17
5
2
Meta Tags4/15
Content10/12
Headings0/8
Technical13/25
E-E-A-T0/7
Images0/7
Links5/5
URL5/5
Social5/5
Freshness4/4
Mobile4/4
Indexability3/3
L
lethain.comlethain.com

Irrational Exuberance

No description available for this page.

Title Length21 chars

Recommended: 50-60 chars (~123px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,203 URLs

robots.txt

Local SEO

Local Search Readiness

7/100
Poor
3 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F38/100
Bot Access
20/25
Machine Read.
4/25
Schema Data
0/25
Citation
14/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:19%
Words:7,422
Token eff.:Excessive
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary50w
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (6)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
B
74/100
10
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
12/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
3/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
62/100
A+
7 mg
CO₂e / view
54.0 KB
Page Weight
95%
Cleaner Than
New Visitor
8 mg
vs
Returning (cached)
4 mg
Annual (10K/mo)
804 g
Emission Segments
Data Center
2 mg
Network
2 mg
Device
4 mg
Resource Breakdown
CSS
16.2 KB
HTML
37.9 KB
Green Hosting Not Verified
GitHub Pages
3 recommendations
  • •Carbon footprint recommendation preview...
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B

Security Score

71%Good
Static / Informational

HTTPS

No WAF

76d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

23.04.2026

Valid Until

22.07.2026

Subject Alternative Names (2)

lethain.comwww.lethain.com

SHA-256 Fingerprint

33:CE:4A:EE:50:52:D7:3A:C2:9A:99:E2:13:23:69:24:4C:A6:4F:F2...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
access-control-allow-origin
*
age
0
cache-control
🟡 600s(max-age=600)
content-encoding
📦 Gzip(gzip)
content-length
38499
Good Warning Issue

Email Infrastructure

Google Workspace

Score

45

SPF
DKIM
DMARC

MX Records (5)

alt1.aspmx.l.google.com
alt3.aspmx.l.google.com
alt2.aspmx.l.google.com
alt4.aspmx.l.google.com

+1 more

Domain Information

lethain.com

Domain Age
18y 10m

Created

22.06.2007

Expires

22.06.2029

Last Updated

22.11.2022

Registrar

Amazon Registrar, Inc.

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
D
56/100
Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width,minimum-scale=1
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

avenir next

WCAG AAA
72/100
Readability
/30
24/30

16px · LH 1.50

Hierarchy
/20
10/20
WCAG
/25
24/25

9.4:1 min contrast

Performance
/25
14/25

1 font

Heading Font

avenir next

Body Font

avenir next

Sans16px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~38 CPL

Narrow lines
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 30/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 30

Color Palette

7 unique colors
2.1:1 Fail Light
#ffffff
Background· 91.69999999999999%
#b0b3bc
Secondary· 2.7%
#989bac
Primary· 0.9%
#797890
Secondary· 0.8%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
PlausibleSMB
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

3 Resources

1
Scripts
2
Styles
0
Async
1
Defer

Top Script Sources

plausible.io(1)

Website Identity

lethain.com

18 years old
Location detected: 🇺🇸 United Statesvia ip
Amazon Registrar, Inc.📧 Google Workspaceen-us

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Last analyzed: 07 May 2026 at 07:39

Historical Analysis & Change Tracking

lethain.com Technology Stack - Built With Angular, Tailwind CSS, Plausible Analytics | StackOptic | StackOptic